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arXiv · 2605.02642

Floquet-Multiple Andreev Reflections

Régis Mélin·Romain Danneau·Morteza Kayyalha
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Abstract

Floquet theory describes quantum systems governed by time-periodic Hamiltonians, much as Bloch theory describes spatially periodic solids. In voltage-biased multiterminal Josephson junctions, the Josephson relation causes superconducting phase differences to evolve periodically in time, thereby providing an intrinsic Floquet drive. In this Letter, we consider three-terminal Josephson junctions formed on a ballistic two-dimensional normal conductor with a continuum of electronic states. We show that the quartet and higher-order multipair processes yield characteristic Floquet-multiple Andreev reflection (Floquet-MAR) finite-bias conductance and noise resonances that are parameterized by the bias voltage and electrochemical potential. This microscopic picture opens a route toward implementing and probing Floquet-MAR physics in ballistic multiterminal Josephson junctions.

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Régis Mélin, Romain Danneau, Morteza Kayyalha. 2026-05-04. Floquet-Multiple Andreev Reflections. https://arxiv.org/abs/2605.02642

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